Argentinian artist Leandro Erlich created this illusion of people walking underwater called The Swimming Pool, for The Century Museum of Contemporary Art in Kanazawa, Japan. It's a piece of glass with water on top of it, and empty space on the bottom.

His moustache was as popular, if not more, than his art! Surrealist painter Salvador Dali topped a new poll of the best-known moustaches of all time. Here's a look at some moustaches that made the cut.